[commoner]

Microsoft Office's native format is OOXML (Office Open XML). The ODF (OpenDocument Format) is the native format of LibreOffice, and the UK decided to go with this one (despite Microsoft's lobbying).

https://www.computerweekly.com/news/2240225262/Microsoft-att...

https://www.gov.uk/guidance/using-open-document-formats-odf-...